8.7 Lymphatic system (Book
1B, p. 8-28)
Ø The lymphatic
system consists of:
n (1) lymph (淋巴)
n lymph vessels (淋巴管)
n (2) lymph nodes (淋巴結).
Component
|
Feature
|
Lymph
|
n
Has the
same composition as (3) tissue
fluid,
n
Composition
is similar to (4) blood except for the absence
of red blood cells, blood
platelets and (5) plasma proteins
|
Lymph vessels
|
n
Formed
by joining of (6) lymph
capillaries
n Lymph inside is kept flowing very slowly
by the contraction of the
(7) skeletal
muscles
n
(8) valves are
present to prevent backflow of lymph
|
Lymph nodes
|
n Located at intervals along the lymph
vessels
n
(9) White blood cells accumulate there to kill the germs in the lymph
|
Ø Functions of the lymphatic
system:
n Returns excess (10) tissue fluid to the blood
circulation
n Protects us
against disease by(11) filtering
out germs from the lymph
n Transports (12) lipids from the lacteals in intestinal villi to the
blood
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